Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 58: OFETs, OLEDs, and organic optoelectronics

HL 58.6: Talk

Wednesday, March 18, 2015, 17:45–18:00, EW 202

Extracting the emitter orientation in organic light-emitting diodes from external quantum efficiency measurements — •Tobias D. Schmidt¹, Lukas J. Reichardt¹, Andreas F. Rausch², Sebastian Wehrmeister¹, Bert J. Scholz¹, Christian Mayr¹, Thomas Wehlus², Rossa Mac Ciarnain³, Norbert Danz³, Thilo C. G. Reusch², and Wolfgang Brütting¹ — ¹Institute of Physics, University of Augsburg, 86135 Augsburg, Germany — ²OSRAM OLED GmbH, Wernerwerkstrasse 2, 93049 Regensburg, Germany — ³Fraunhofer Institute for Applied Optics and Precision Engineering, 07745 Jena, Germany

Emitter orientation will play a major role in future applications of organic light-emitting diodes due to its strong impact on the efficiency of the devices. Up to now, determining the orientation of transition dipole moments required elaborate angular-dependent measurements of the light emission pattern. In this paper, we present a simplified and straightforward method to extract the emitter orientation from external quantum efficiency measurements. We demonstrate the validity of the method on three different dye-doped emitting systems.